Worksheet 333 · Skill 3

Dead reckoning

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1. At 1055 you fix your position 079°T, 1.6 nm from Gannet Rock daybeacon. You steer 279°T at 8.8 kn until 1110, then 008°T at 8.1 kn until 1120.

   Give the 1120 DR position as the true bearing FROM Tern Island tower to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Tern Island tower: ________ °T   Distance: ________ nm  

2. At 1135 you fix your position 140°T, 3.8 nm from Westfield church spire. You steer 010°T at 8.5 kn until 1205, then 213°T at 6.0 kn until 1245.

   Give the 1245 DR position as the true bearing FROM Heron Point Light to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Heron Point Light: ________ °T   Distance: ________ nm  

3. At 0750 you fix your position 019°T, 3.7 nm from Westfield church spire. You steer 158°T at 8.2 kn until 0835, then 095°T at 7.6 kn until 0905.

   Give the 0905 DR position as the true bearing FROM Gannet Rock daybeacon to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Gannet Rock daybeacon: ________ °T   Distance: ________ nm  

4. At 1355 you fix your position 093°T, 1.1 nm from Westfield church spire. You steer 061°T at 8.7 kn until 1425, then 006°T at 9.0 kn until 1435.

   Give the 1435 DR position as the true bearing FROM Tern Island tower to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Tern Island tower: ________ °T   Distance: ________ nm  

5. At 0730 you fix your position 006°T, 1.4 nm from Heron Point Light. You steer 087°T at 5.1 kn until 0750, then 246°T at 4.6 kn until 0810.

   Give the 0810 DR position as the true bearing FROM Heron Point Light to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Heron Point Light: ________ °T   Distance: ________ nm  

6. At 1455 you fix your position 066°T, 1.4 nm from Gannet Rock daybeacon. You steer 185°T at 4.5 kn until 1525, then 358°T at 7.4 kn until 1600.

   Give the 1600 DR position as the true bearing FROM Tern Island tower to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Tern Island tower: ________ °T   Distance: ________ nm  

7. At 1110 you fix your position 040°T, 2.1 nm from Mill stack. You steer 250°T at 4.7 kn until 1130, then 062°T at 6.8 kn until 1155.

   Give the 1155 DR position as the true bearing FROM Gannet Rock daybeacon to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Gannet Rock daybeacon: ________ °T   Distance: ________ nm  

8. At 1335 you fix your position 223°T, 2.3 nm from Gannet Rock daybeacon. You steer 102°T at 6.1 kn until 1405, then 020°T at 6.2 kn until 1430.

   Give the 1430 DR position as the true bearing FROM Gannet Rock daybeacon to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Gannet Rock daybeacon: ________ °T   Distance: ________ nm